Height adjustable desk



FIG. 1 is a perspective view of a height adjustable desk in a collapsed position, showing my new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a perspective view of a height adjustable desk in an extended position;

FIG. 10 is another perspective view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a bottom view thereof;

FIG. 13 is a top view thereof;

FIG. 14 is a rear view thereof;

FIG. 15 is a left side view thereof; and,

FIG. 16 is a right side view thereof. 

CLAIM The ornamental design for a height adjustable desk, as shown and described. 